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Science Log Six

Volume, Mass, and Density. Science Log Six. Observation. An observation is something you detect using one or more of your five senses. . I see a pile of leaves. I see a rake. I see green grass. Inference. An inference is what you decide about an observation. It is fall. OR

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Science Log Six

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  1. Volume, Mass, and Density Science Log Six

  2. Observation An observation is something you detect using one or more of your five senses. • I see a pile of leaves. • I see a rake. • I see green grass.

  3. Inference An inference is what you decide about an observation. • It is fall. OR • Someone raked the leaves into a pile.

  4. Prediction Is an educated guess about a future event. A prediction MAY or MAY NOT happen but should be logical. • A kid will jump in the leaves. (may or may not happen)

  5. Mass The amount of matter in an object.

  6. Density (click to play) Density is a physical property of matter. Most commonly density refers either to the mass per unit volume (mass density) or the number of objects (e.g., atoms, molecules) per unit volume (number density). mass divided by volume

  7. 1a. Which tool did the student use to measure the mass of each metal ball? The two graduated cylinders pictured can hold the same amount of water and use the same scale. A student measures the masses of two metal balls. One ball is made of aluminum and the other ball is made of lead. The student adds 50 mL of water to each graduated cylinder and then drops one metal ball into each graduated cylinder. Trick Question!!!

  8. 1b. The student includes the sentence below in the write-up of this investigation. “The lead ball has a measured mass of 113 grams.” The two graduated cylinders pictured can hold the same amount of water and use the same scale. A student measures the masses of two metal balls. One ball is made of aluminum and the other ball is made of lead. The student adds 50 mL of water to each graduated cylinder and then drops one metal ball into each graduated cylinder. inference? prediction? explanation? observation?

  9. 1c. The teacher asks the student to use the information she collected to compare the density of the two metal balls. The mass of the lead ball is 113 grams and the mass of the aluminum ball is 27 grams. The two graduated cylinders pictured can hold the same amount of water and use the same scale. A student measures the masses of two metal balls. One ball is made of aluminum and the other ball is made of lead. The student adds 50 mL of water to each graduated cylinder and then drops one metal ball into each graduated cylinder. Lead Ball Mass=113 grams Volume=10 mL Density= 113/10 =11.3 g/mL Aluminum Ball Mass=27 grams Volume=10 mL Density= 27/10 =2.7 g/mL

  10. 2.In repeating the investigation, the student accidentally drops and steps on the lead ball. This action changes its shape from a sphere to an egg-shaped solid. The lead ball is placed back into the graduated cylinder. In your answer, predict what effect, if any, this change has on the amount of water displaced by the lead ball. Explain your prediction. • graduated cylinder • add water • add sphere of puddy • how much does it displace? • remove puddy • change its shape • determine its volume again

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